To estimate the profit in 2007 using the equation of the trend line, you can substitute x = 7 (since 2007 is 7 years after 2000) into the equation y = 0.2x + 4.8:
y = 0.2 * 7 + 4.8
y = 1.4 + 4.8
y = 6.2
So, the estimated profit for the airline in 2007 is $6.2 million.
Now, to estimate the profit in 2002, you can substitute x = 2 (since 2002 is 2 years after 2000) into the equation:
y = 0.2 * 2 + 4.8
y = 0.4 + 4.8
y = 5.2
So, the estimated profit for the airline in 2002 is $5.2 million.